Figure 13.

A 16-year-old male complained of right shoulder pain after arthroscopic subscapularis repair. (a) Frontal radiograph shows a displaced metallic suture (arrow). (b) Fat-suppressed T₂ weighted (repetition time/echo time, 3416/55 ms) coronal view shows numerous intra-articular bodies (arrow) in the axillary recess. (c) Fat-suppressed intermediate-weighted (repetition time/echo time, 2216/42 ms) axial view shows complex synovial thickening (arrow) and numerous intra-articular bodies, which may represent blood products. Laboratory findings indicated elevated C-reactive protein (60.4 mg l; normal, 0–11 mg l) and elevated white blood cell count (10.3; normal, 3.9–9.8 × 10³ μl). The patient underwent arthroscopic debridement, removal of the suture anchor and synovectomy. Aseptic diffuse synovitis has been described after the use of absorbable suture anchors, but infection can also cause similar clinical and radiographic findings.